Steam-boiler.



F. SLERKA.

STEAM BOILER.

APPLICATION FILED AUG. 3, I9I4. 1,1 99,623. Patented Sept. 26,1916.

2 SHEETS-SHEET 2.

Z Z 17 I 5 d 7a/ mm 1 UNITED STATES PATENT OFFICE.

FRANK SLEBKA, OF SCHUYL ER, NEBRASKA.

STEAM-BOILER.

Application filed August 8, 1914. Serial No. 854,811.

To all whom it may concern Be it known that I, FRANK SLERKA, a citizen of the United States, residing at Schuyler, in the county of Colfax and State of Nebraska, have invented certain new 7 and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

This invention relates to steam boilers, and one of the principal objects of the invention is to provide a boiler having an inclosed fire box adapted to receive liquid fuel sprayed against a fire brick bridge wall made of checker work, and to provide means for forcing air into the fire box, and providing means for operating a valve when there is an excessive pressure in the fire box to permit the exhaust to mix with the boiler water to increase the steam pressure.

Another object of the invention is to provide a steam boiler having means for regulating the pressure automatlcally and for utilizing the exhaust for running a steam turbine or dynamo to acquire the necessary air pressure for feeding the fuel into the fire box.

These and other objects may be attained by means of the construction illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal sectional view through the boiler and showing a portion of one end ofthe fire box broken away. Fig 2 is a vertical sectional view taken on the hue -22 of Fig. 1, looking in the direction indicated by the arrows, and made on a larger scale, Fig. 3 is a detail longitudinal sectional view of the exhaust valves or pistons, Fig. 4 is a detail sectional view of the exhaust tube, Fig. 5 is a longitudinal sectional view of a portion of the same, and Fig. 6 is a detail vertical sectional view of the exhaust valve or pistons operating from the upper portions of the boiler 1 and the pipe 5 extending from the air tank 4.

Referring to the drawings, the numeral 1 designates a boiler, 2 3 is a safety valve. A combined fuel tank and compressed air reservoir 4 is provided with an air pipe 5 leading from the top thereof down through a vertical branch 6 and into a fire box 7, while the fuel pipe 8 leads from the bottom of the tank and is .connected at 9 to the air pipe 6. The air in- Speclflcation of Letters rum.

is the steam dome, and

Patented Sept. 26, 1916.

let valve a, and the oil inlet valve 5 are connectedv to the pi es near the mixing point.

The fire box is provided with fire brick checker work 10 near the fuel inlet-end, and a suitable sparking device 11 is disposed in the space 12 adjacent the checker work '10. Near the opposite end of the fire box is a valve casing 13 which communicates with the fire box and-extends through an opening in the boiler head. Outside the boiler is a flaring spider 14 which terminates in an extended valve casing 15. A valve stem. 16 extends through the casing and is provided with a valve head 17- upon one end, and a' smaller valve head 18 upon the opposite end, said valve heads. fitting the portions 13 and 15 of the valve casing. The air pipe 5 leads from the top of the combined fuel and compressed air tank 4 through thesafety valve 3, and from thence down to the valve casing 15 where it communicates with the same at more clearly in Fig. 3.

At the bottom and preferably at one side one side of the piston head 18, asshown of the fire box 7 is an exhaust tube 19 which I The operation of the invention may be briefly described as follows:

The air pressure in the tank 4 is constantly maintained at one hundred and sixty-five pounds per square inch by a pump not shown. When the boiler 1 is .filled with water the valve 0; leading to the air tank is partially opened and air is admitted to the fire box 7. The fuel valve 5 is partially opened and the combined air and gas is ignited by the sparker 11, said gas and air being sprayed against the bridge. wall checker work 10. As the area of its working face is greater than the area of the working face of the piston 18, the-valve 17 will, when the pressure in the fire box 7 reaches one hundred and fifty-two pounds per square inch or greater, be forced outwardly to open communications between the fire box and the e haust pipe 19. The combined fuel, gas" and air then passes through the exhaust pipe 19 and a quantity of water is carried through the semi-tubular funnels 21, the exhaust finally mixing with the water in the boiler 1. When the pressure-in the fire box 7 falls below one hundred and fifty-two ounds per square inch, the air pressure acts against the working face of the piston 18 and moves the valve 17 inwardly and closes the exhaust pipe 19. Should the boiler pressure reach more than one hundred and fiftypou'nds per square inch the safety valve 3 will be operated to blow off through the outlet 03, and it can be readily seen that should the pressure in the boiler exceed 152 pounds per square inch that the ressure acting upon the working face of t e valve 17* would force the same upwardly against the pressure on its opposite face thereby opening the exhaust port (1. When the pressure in the fire box falls below 152 pounds per square inch, the air pressure coming in from the tank 4 enters through the pipe ,5 and acts against the piston face 18 closing the exhaust port d. As the openings through the valves a and b are smaller than the diameter of the pipes 6 and 8, and as the valves are only partially opened, the pressure of the air and gas entering the combustion chamber 7 from the pipes 6 and 8 will be considerably less than the pressure in the reservoir 4. The exhaust may be utilized, however for operating a turbine or a dynamo for recharging the air tank.

What is claimed is 1. A steam boiler provided with an interior fire box, a combined compressed air tank'and fuel tank, pipes leading from said tanks into said fire box, a sparking device, an exhaust pipe for said fire box, acompound valve for controlling communication etween the fire box and the boiler, and one and an air pipe communicating with said tank and valve, and a valve connected to said pipe and to said boiler for permitting the excess pressure in said'boiler to escape therethrough automatically.

3. A steam boiler provided with an interior fire box, a combined compressed air tank and fuel tank, pipes leadin from said tanks to the said fire box, a spar ing device or exhaust pipe from said fire box, a com pound valve for controlling the communication between the fire box and the boiler, said valve operated by the pressure from the air tank, and also operated by the pressure in the fire box.

In testimon whereof I affix my signature in presence 0 two witnesses.

FRANK SLERKA.

Witnesses:

JOHN L. DUDEK, R. A. DARICEK. 

